[Tutor] Nested, line by line, file reading
Alan Gauld
alan.gauld at btinternet.com
Sun Dec 16 16:38:28 CET 2007
"Alan Gauld" <alan.gauld at btinternet.com> wrote
> found2 = False
> for line in file("prueba.txt"):
> if '2' in line: found2 = True
> if found2: print line
> else: continue
Just after posting I realised it would be better to do:
found2 = False
for line in file("prueba.txt"):
found2 = found2 or line.startswith('2')
if found2: print line
The continue was superfluous and the if test
less efficient that the boolean test.
line.startswith seems a more appropriate test too,
and should be more efficient on long lines.
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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